Please help solve the following problem using definition of derative:

The function f' dened by the formula . w+Mf@) I : 1 f (m) a h is called the derivative of f with respect to .'E. The domain of f' consists of all a: in the domain of f for which the limit exists. (a) Use the denition to nd f'[:c) when f (:1?) = E W = Z . . 6 (1)) Find the tangent line to the graph of at) = E at :1: = 1